On Sat, 19 May 2007 13:35:01 +0200 Andi Kleen <[EMAIL PROTECTED]> wrote:
> > We have the advantage that if the kernel very occasionally gets the wrong > > result for PageReadahead(page), nothing particularly bad will happen, so we > > can do racy things. > > On 64bit there is no particular shortage of page flags. I think pretty much all of the upper 32 bits got used for ia64 fields, but it's never been very clear how many were actually used or needed. > If you ever do racy things please do them 32bit only. hrm. It *really* won't matter if we make one suboptimal readahead decision every second day. And there's value in having the same behaviour on all architectures. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
